HT47C20 datasheet(6/56 Pages) HOLTEK

6 / 56 page

Pad No.

Pad Name

I/O

Mask

Option

Function

VDD

¾¾

Positive power supply

OSC2

OSC1

Crystal or

OSC1 and OSC2 are connected to an RC network or a

crystal (by mask option) for the internal system clock.

Absolute Maximum Ratings

Supply Voltage..............................-0.3V to 5.5V

Input Voltage.................VSS-0.3V to VDD+0.3V

Storage Temperature.................-50°Cto125°C

Operating Temperature ..............-40°Cto85°C

Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maxi-

mum Ratings² may cause substantial damage to the device. Functional operation of this de-

vice at other conditions beyond those listed in the specification is not implied and prolonged

exposure to extreme conditions may affect device reliability.

D.C. Characteristics

Ta=25°C

Symbol

Parameter

Test Conditions

Min. Typ. Max. Unit

VDD

Conditions

VDD

Operating Voltage

¾¾

2.4

3.6

IDD1

Operating Current

(Crystal OSC)

3V No load, fSYS=455kHz

A/D Off

0.2

0.4

IDD2

Operating Current (RC OSC)

3V No load, fSYS=455kHz

A/D Off

0.2

0.4

ISTB1

Standby Current

(32.768kHz Crystal Oscillator

Enable, LCD Off)

3V No load, system Halt

¾¾

ISTB2

Standby Current

(32.768kHz Crystal Oscillator

Enable, LCD On)

3V No load, system Halt

¾¾

ISTB3

Standby Current

(Watchdog RC Oscillator

Enable, LCD Off)

3V No load, system Halt

¾¾

ISTB4

Standby Current

(Watchdog RC Oscillator

Enable, LCD On)

3V No load, system Halt

¾¾

ISTB5

Standby Current

(32.768kHz Crystal and

Watchdog RC Oscillator Both

Disabled, LCD Off)

3V No load, system Halt

¾¾

HT47C20

January 18, 2000

HT47C20 Folha de dados(PDF) 6 Page - Holtek Semiconductor Inc

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